Controlling the immediate surrounding points around a certain point, results in the surrounded point being captured by whichever side controls the surroundings.

Encirclement-capture only works when the target point is not linked to other nodes under the same ownership.

Encirclement has no effect on echelons.

Encirclement-capture affects the enemy the same way as it affects the player.

Encirclement limit example

As above, the other two points are unable to be held due to being linked to enemy points, even if captured by an echelon at the end of the turn, will be immediately re-captured by encirclement. The first point has no such problems as it's linked to a friendly point. (Friendly Airfield)

By occupying two points with two echelons that are linked to each other in enemy territory it is possible to create a friendly-controlled 'pocket' while surrounded by enemy controlled points. (As it contains two points instead of one)